Bronzing or metal-surfacing machine.



E. WEING'A'RTNER @L w. FRlEss.

BRONZING OR METAL SURFACING MACHINE.

APPLICATION FILED APR. I9. 1913.

1,140,642. Patented May-25,1915.

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EDUAEIJ WEINGRTNER,oELEIPzIG-LAGWITZ, AND WILHELM ERIEss, 0E LEIPZIG- A LINDENAU, GERMANY.

BEONZING on METAL-sUEEAcING MACHINE.

T0 all whom/it may concern:

Be it known that we, EDUARD WEINGRT- NER and WILHELM' FRIEss, subjects of the Emperor of Germany, residing in Leipzig- Plagwitz and Leipzig-Lindenau, Germany, respectively, have invented certain new and useful Improvements yin Bronzing or Metal- Surfacing Machines, of which the following is a specification.

In bronzing, metal powder surfacing and like machines of thekind in which dusting or wiping devices are used consisting of bands of plush, fur felt or the like moving transversely to the sheets to be dusted and in opposition to one another, such bands as a rule' are moved in the plane of travel of the sheets. This is a drawback because the edges of the sheetsl particularly in the case of relatively thick paper sheets, being directed against the path of travel of the dusting bands, offer a certain resistance and are worn off prematurely by the constant friction with the bands. Moreover owing to the friction the bronze dust or powder contained in the bands is loosenedl or disturbed and thereby is caused to drop. Thus the sheets are liable to become dirty owing to the fact that not only7 the droppingA dust but also the dust falling onrthe carrier laterally of the sheet is caused to penetrate beneath the sheet where it adheres and in thesubsequent handling of the sheets is scattered over the whole sheet pile. Further it frequently occurs that the sheet in passing through the machine is seized by the bands and thereby is torn orv crumpled. In order to avoid these drawbacks it has already been proposedto move the dusting bands toward the sheet from behind one of its edges and away from in front of its'other edge obliquely. I-Iowever the carrying out of this idea has not been successful since in this operation a relatively broad strip on each of the lateral edges of the sheet is not touched by the bands at all, so that the dust seated on the untouched parts of thersheet is ultimately scattered among the sheets of the pile.

Now according to this invention the drawbacks above mentioned are obviated by arranging the guide rollers for the dusting bands in such a manner that the bands which travel transversely to the direction of movement of the sheets are brought into contact with the latter slantingly vover one edge thereof, so that the bands come into contact Specicaton of Letters Patent.

Application filed April 19, 1913.

Patented Mayi, 1915.

Serial No. 762,368.

with the sheets inside but near one edge thereof, and then move across the sheet in Contact therewith and over its opposite edge in the plane of the sheet.

Figure 1 shows in plan the arrangement of the dusting bands with regard to the working table of the machine, and Fig. 2 is a front elevation of Fig. l.

In the constructional example shown in Figs. l and 2 arranged at each longitudinal side of the machine is a pair of rollers a c and b Z respectively. Of these rollers one is adjustable in vertical direction and the other is a fixture. lI`he rollers a b form one pair and the rollers c d the other pair of rotatable guide rollers for the band. As shown the adjustable rollers a Z are located in different planes and are arranged at a higher level than the fixed rollers b c as shown in Fig. 2. The endless wiping bands c f travel each over-one adjustable and one fixed roller and during the rotation of the rollers are driven in opposite directions transversely to the path of travel of the sheets across the working table of the machine. Arranged between the wiping bands c f are two guide rollers g l1, respectively. These rollers as shown are suspended by means of bosses i from a stationary 'carrier or rod la on which they may be adjusted by displacement of their bosses i. These guide rollers g h reach down to such a depth that the lower portions of the wiping bands e 7 are held under a certain amount of tension and thereby are caused to exert on the sheets passing through the machine a frictional effect to such a degree that the superfluous dust or powder applied to the sheets is wiped olf whereby the latter are cleaned and swept. The lower edges of the fixed rollers b 0 are flush with the lower edges of the guide rollersg h and since the rollers b c are larranged outside the machine frame they have the effect that the lateral edges of the sheets are cleaned at the same time and that the superfluous powder is completely removed from the machine and further that the sheets are prevented from rising or flying up. rIhe adjustable rollers a Z together with the guide rollers C/ 7Ly have the object to conduct the wiping bands c f obliquely across the lateral edges of the sheets and thus prevent the sheets from being carried along and crumpled or damaged.

Located beneath each fixed roller Z) c outside of the machine frame and in the path of the wiping bands e f is a rotary brush AZ or the like by which the Velastic body or coating and cleaning brushes Z are each arranged by preference 1n a casing m. These casings are connected to a suction apparatus whereby the bronze dust or powder dropping down from the bands is conveyed to a suitable collector. It is obvious that the wiping bands can also be made to travel directly across vopen conduits located outside the machiney frame and connected to the suitable suction apparatus so that in this `way the dust removed from the elastic bands may be directly sucked away.

What we claim and desire to secure by Letters Patent is 1. A dust wiping device for bronzing and like machines, comprising endless wiping bands, means for moving said bands transversely to the path of the sheets, guide rollers for said bands arranged so as to cause the bands to be brought into contact with the sheets slantingly over one edge thereof so that the bands come into contact with the sheets inside but near one edgevthereof and then move across the sheet in contact therewith and over its other edge in the plane of the sheet, substantially as set forth.

2. A dust wiping device for bronzing and like Amachines comprising endless wiping bands, means for moving said bands transversely to the path of the sheets, an adjustable guide roller mounted at one side of the machine, and a fixed guide roller mounted at the other side of the machine for each band, one of said guide rollers being arranged at a higher level than the other,

means for adjusting the height of said ad- 1 justable roller, and auxiliary guide rollers arranged within said wiping bands.

3. A dust wiping device for bronzing and like machines comprising endless wiping bands, means for moving `said bands transversely to the path of the sheets, an adjustable guide roller mounted at one side .of the machine, and a fixed guide roller mount- Copies ofithis patent may ne obtained for ed at the other side ofthe machine foreach band, one of said guide rollers Vbeing arranged at a higher level than the other,Y y:means for adjusting the height of said adjustable roller, auxiliary guide rollers arrangedwithin said wiping bands, and a rotary brush located below 'said guide rollers and'in contact with the surface of said bands. o

4. A dust wiping device` for bronzing and like machines comprising endless wiping bands, means for moving said bands transversely to the path of the sheet, an adjustable guide rollermounted at one side of the machine, and ai'fixed guide roller mounted at the other side of the Vmachine for each band, one of said guide rollers being arranged at a higher level than the other, means for adjusting the heightof said adjustable roller, auxiliary guide rollers arranged within said wiping bands, and a rotary brush located below said guide rollers and in contact with the surface of said ranged at a higher level than the other,

means for adjusting'the height of said adjustable roller, auxiliary guide rollers arranged within saidwiping bands, and open conduits located. outside of the machine and connected to a j suction apparatus across which saidbands are guided.

In testimony whereof we have affixed our signatures in presence of two witnesses.

Y EDUARD WEINGARTNER.

l WILHELM FRIESS. Witnesses: W

MORITZ SPREEB,

RUDULPH FRIGKE.

five cents each/by addressing `the Commissioner ofV atents. Washington, D. C, V 9 

